California fireworks explosion injures 28

Victims are treated by medical personnel and volunteers at Ranch Santa Susana Community Park in Simi Valley Thursday night. A number of people were injured due to a fireworks related accident during the annual Fourth of July celebration. (WENDY PIERRO/THE STAR)

Victims are treated by medical personnel and volunteers at Ranch Santa Susana Community Park in Simi Valley Thursday night. A number of people were injured due to a fireworks related accident during the annual Fourth of July celebration. (WENDY PIERRO/THE STAR)

A triage area was set up at Ranch Santa Susana Community Park in Simi Valley Thursday night. A number of people were injured due to a fireworks related accident during the annual Fourth of July celebration. (WENDY PIERRO/THE STAR)

An injured victim is driven away at Ranch Santa Susana Community Park in Simi Valley Thursday night. A number of people were injured due to a fireworks related accident during the annual Fourth of July celebration. (WENDY PIERRO/THE STAR)

A victim is carried away by medical personnel at Ranch Santa Susana Community Park in Simi Valley Thursday night. A number of people were injured due to a fireworks related accident during the annual Fourth of July celebration. (WENDY PIERRO/THE STAR)

Fireworks explode close to the ground and near the crowd at the Simi Valley Fourth of July show. (Photo courtesy of Jessica Herron)

The Simi Valley fireworks explosion as seen from a distance. (Photo courtesy of Brian Dennert)